William buechley astd theodore thoejt



w. BUECHLEY & T. THDRN';

Apparatus-for Mining.

Patented March 2,1875. Q

THE GRAPHIC C0.PHOTO -LH ".39 i4! PARK PLAGLNY- screws or otherappliances.

"UNITED STATES PAIEN Orrrc WILLIAM BUEOHL'EY AND THEODORE THORN, OFPOTTSVILLE, PA.

IMPROVEMENTS IN APPARATUS FOR MINING.

Specification forming part of Letters Patent No. 160,303, dated March 2,1875 application filed February 3, 1875.

it pertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

The nature of our invention consists in the construction and arrangementof a drill for v miners, as will be hereinafter more fully set forth.

In the annexed drawing, Figure 1 is a side elevation of our drill andthe devices for using the same. Fig. 2 is an enlarged side view of thecutter-head. Fig. 3 is an end View of the same. Fig. 4 is a View of oneof the cutters.

A represents the stub or cutterhead, in which the cutters B B areinserted by being passed into dovetailed angular grooves from thecircumference to the center. The cutters stand to the center, as shownin Fig. 3, in such a manner as to avoid making a lip to the same,whereby the liability of breakage is obviated. The head A is formed withexterior screw-threads, and screwed into the end of the hollowdrill-shaft 0 far enough for the end of the shaft to inclose the innerends of the cutters, thereby holding the same firmly in place withoutthe aid of any set- In the head A, between the cutters B, are madetwisted grooves a a, to allow the dirt to pass through into the hollowstem or shaft G. The other end of the shaft 0 is fastened in one arm orend of the crank D, thereby allowing the dirt to pass out through thestem while it is working when the hole is on an upward pitch. In theother end or arm of the crank D is screwed the feed screw E, whichpasses through the nut 12, attached to the beam G. This nut is formed onthe end of a bolt, which is passed through the beam G, and fastened inany desired position by a thumb-nut, d, placed on the other end;

WVhen the feed-screw E is run out to its full length it is simplyunscrewed from the handle or crank D, and another section of pipe added.The feed-screw is then turned end for end by turning the eye-pin or nutand bolt 12, which gives room for the second section of pipe, therebyavoiding the trouble and saving the time of running the feed-screw backon its thread.

The drill is held in any desired position by means of an adjustableclaw-foot, H, projecting from one end of the beam G, and a lever, I,pivoted in a slot at the other end thereof. 0n the end of the lever is arubber shoe, h, for friction.

In Fig.1 we have shown one position in which the drill may be placed;but it will readily be seen -that it will brace itself in every positionby the force brought against it by the lever and its rubber shoe and theadjustable claw-foot, by which latter the post may be lengthened out tosuit any height of View.

.J represents a screw-scraper to clean out the dirt from the pipe 0 whenthe hole is downward.

The hollow stem Ois, near its outer end, provided with one or moreslots, so, for the purpose of catching any loose chip of dirt that mayhappen to get clogged on the outside of the stem,

In case the cutter-head should go through a small pocket of soft dirt,the slot or slots 00 will gather it up, and it willbe forced to the endof the stem or drill. Besides, these slots may be of great benefit indrilling a vertical hole.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is

1. The screw-threaded cutter-head A, having twisted grooves a andangular dovetailed slots, for the insertion of the cutters B, incombination with said cutters, arranged to slide in the slots from thecircumference toward the center, as and for the purpose specified.

2. The combination of the stem 0, crank or In testimony that we claimthe foregoing as handle D, feed-screw E, and the adjustable our own weaffix our signatures in presence eye-pin b in the beam G, substantiallyas and of two witnesses.

for the purposes herein set forth. WILLIAM BUEGHLE 3. The combination ofthe beam G, carrying THEODORE THORN.

the drill, the adjustable claw-foot H, and piv- Witnesses:

oted lever I, with rubber shoe h, substantially JAMES R. REED,

as and for the purposes herein set forth. TERENCE SMITH.

